Analysis of trends, periodicities, and correlations in the beryllium-7 time series in Northern Europe
Само за регистроване кориснике
2019
Аутори
Bianchi, StefanoPlastino, Wolfango
Brattich, Erika
Đurđević, Vladimir
Longo, Alessandro
Hernandez-Ceballos, Miguel A.
Sarvan, Darko
Ajtić, Jelena
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
The activity concentrations of beryllium-7, a natural radiotracer that is considered as a tracer of the strato-spheric-tropospheric exchange, shows a distinct behaviour in Northern Europe compared to the central and southern parts of the continent. In this study, we use the measurements collected at four sampling stations in Scandinavia (Ivalo, Umea, Kista, Risoe) between 2001 and 2010 and investigate their trends, periodicities and residuals with the aim to further understand the common features in the beryllium-7 data records in northern sampling sites. The beryllium-7 activity concentrations exhibit statistically significant positive trends that range from an average value of 1.50%/year to an average value of 2.96%/year. We detect a one-year periodicity in all the sites, and in the southernmost site, Risoe in Denmark, additional higher-frequency harmonics. In the residual time series, we find outliers that represent occurrences of extremely high beryllium-7 activity concentration. C...ross-correlations of the beryllium-7 residuals across the four sites decrease with increasing distance; similarly, as indicated by local Hurst exponents the records exhibit long-range correlations that weaken towards the end of the investigated period. To investigate the causes of the detected trends, we also calculate correlations between beryllium-7 and factors related to its production, transport and removal from the atmosphere: in particular, cross-correlations of the beryllium-7 residuals with residuals in sunspot number, local temperature, atmospheric pressure and precipitation, as well as Arctic Oscillation index and North Atlantic Oscillation index. Most of the obtained correlations, however, are not statistically significant, highlighting the need to analyse a longer time period in order to evaluate the impact of different factors on the airborne beryllium-7 activity concentration.
Кључне речи:
Beryllium-7 / Decomposition / Outliers / Hurst exponent / Cross-correlationИзвор:
Applied Radiation and Isotopes, 2019, 148, 160-167Издавач:
- Pergamon-Elsevier Science Ltd, Oxford
Финансирање / пројекти:
- Истраживање климатских промена и њиховог утицаја на животну средину - праћење утицаја, адаптација и ублажавање (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-43007)
DOI: 10.1016/j.apradiso.2019.03.038
ISSN: 0969-8043
PubMed: 30959353
WoS: 000469892600024
Scopus: 2-s2.0-85063879483
Колекције
Институција/група
Fakultet veterinarske medicineTY - JOUR AU - Bianchi, Stefano AU - Plastino, Wolfango AU - Brattich, Erika AU - Đurđević, Vladimir AU - Longo, Alessandro AU - Hernandez-Ceballos, Miguel A. AU - Sarvan, Darko AU - Ajtić, Jelena PY - 2019 UR - https://vet-erinar.vet.bg.ac.rs/handle/123456789/1745 AB - The activity concentrations of beryllium-7, a natural radiotracer that is considered as a tracer of the strato-spheric-tropospheric exchange, shows a distinct behaviour in Northern Europe compared to the central and southern parts of the continent. In this study, we use the measurements collected at four sampling stations in Scandinavia (Ivalo, Umea, Kista, Risoe) between 2001 and 2010 and investigate their trends, periodicities and residuals with the aim to further understand the common features in the beryllium-7 data records in northern sampling sites. The beryllium-7 activity concentrations exhibit statistically significant positive trends that range from an average value of 1.50%/year to an average value of 2.96%/year. We detect a one-year periodicity in all the sites, and in the southernmost site, Risoe in Denmark, additional higher-frequency harmonics. In the residual time series, we find outliers that represent occurrences of extremely high beryllium-7 activity concentration. Cross-correlations of the beryllium-7 residuals across the four sites decrease with increasing distance; similarly, as indicated by local Hurst exponents the records exhibit long-range correlations that weaken towards the end of the investigated period. To investigate the causes of the detected trends, we also calculate correlations between beryllium-7 and factors related to its production, transport and removal from the atmosphere: in particular, cross-correlations of the beryllium-7 residuals with residuals in sunspot number, local temperature, atmospheric pressure and precipitation, as well as Arctic Oscillation index and North Atlantic Oscillation index. Most of the obtained correlations, however, are not statistically significant, highlighting the need to analyse a longer time period in order to evaluate the impact of different factors on the airborne beryllium-7 activity concentration. PB - Pergamon-Elsevier Science Ltd, Oxford T2 - Applied Radiation and Isotopes T1 - Analysis of trends, periodicities, and correlations in the beryllium-7 time series in Northern Europe VL - 148 SP - 160 EP - 167 DO - 10.1016/j.apradiso.2019.03.038 ER -
@article{ author = "Bianchi, Stefano and Plastino, Wolfango and Brattich, Erika and Đurđević, Vladimir and Longo, Alessandro and Hernandez-Ceballos, Miguel A. and Sarvan, Darko and Ajtić, Jelena", year = "2019", abstract = "The activity concentrations of beryllium-7, a natural radiotracer that is considered as a tracer of the strato-spheric-tropospheric exchange, shows a distinct behaviour in Northern Europe compared to the central and southern parts of the continent. In this study, we use the measurements collected at four sampling stations in Scandinavia (Ivalo, Umea, Kista, Risoe) between 2001 and 2010 and investigate their trends, periodicities and residuals with the aim to further understand the common features in the beryllium-7 data records in northern sampling sites. The beryllium-7 activity concentrations exhibit statistically significant positive trends that range from an average value of 1.50%/year to an average value of 2.96%/year. We detect a one-year periodicity in all the sites, and in the southernmost site, Risoe in Denmark, additional higher-frequency harmonics. In the residual time series, we find outliers that represent occurrences of extremely high beryllium-7 activity concentration. Cross-correlations of the beryllium-7 residuals across the four sites decrease with increasing distance; similarly, as indicated by local Hurst exponents the records exhibit long-range correlations that weaken towards the end of the investigated period. To investigate the causes of the detected trends, we also calculate correlations between beryllium-7 and factors related to its production, transport and removal from the atmosphere: in particular, cross-correlations of the beryllium-7 residuals with residuals in sunspot number, local temperature, atmospheric pressure and precipitation, as well as Arctic Oscillation index and North Atlantic Oscillation index. Most of the obtained correlations, however, are not statistically significant, highlighting the need to analyse a longer time period in order to evaluate the impact of different factors on the airborne beryllium-7 activity concentration.", publisher = "Pergamon-Elsevier Science Ltd, Oxford", journal = "Applied Radiation and Isotopes", title = "Analysis of trends, periodicities, and correlations in the beryllium-7 time series in Northern Europe", volume = "148", pages = "160-167", doi = "10.1016/j.apradiso.2019.03.038" }
Bianchi, S., Plastino, W., Brattich, E., Đurđević, V., Longo, A., Hernandez-Ceballos, M. A., Sarvan, D.,& Ajtić, J.. (2019). Analysis of trends, periodicities, and correlations in the beryllium-7 time series in Northern Europe. in Applied Radiation and Isotopes Pergamon-Elsevier Science Ltd, Oxford., 148, 160-167. https://doi.org/10.1016/j.apradiso.2019.03.038
Bianchi S, Plastino W, Brattich E, Đurđević V, Longo A, Hernandez-Ceballos MA, Sarvan D, Ajtić J. Analysis of trends, periodicities, and correlations in the beryllium-7 time series in Northern Europe. in Applied Radiation and Isotopes. 2019;148:160-167. doi:10.1016/j.apradiso.2019.03.038 .
Bianchi, Stefano, Plastino, Wolfango, Brattich, Erika, Đurđević, Vladimir, Longo, Alessandro, Hernandez-Ceballos, Miguel A., Sarvan, Darko, Ajtić, Jelena, "Analysis of trends, periodicities, and correlations in the beryllium-7 time series in Northern Europe" in Applied Radiation and Isotopes, 148 (2019):160-167, https://doi.org/10.1016/j.apradiso.2019.03.038 . .